Jason Gorman
A lot of hoopla about Google's new quantum computer chip. To put it into perspective, in 2019, largest quantum ICs had ~50 physical qubits. Google's new chip has 105. Experts estimate practical applications of quantum computing when scale reaches a million+, maybe in 60-70 years' time? (If ever)
(That is to say that the applications we're reading about in the Google press releases would require 1M+ physical qubits)
Jason Gorman
QC researchers estimate it will require about 1,000 physical qubits to model one logical qubit, because of the need for error correction.
Even if Willow significantly improves on that ratio, unless they've improved it by 10x, that means Willow implements less than one logical qubit *reliably*.
Their press release is like Intel announcing a chip with less than one transistor by talking about 3D animation and digital signal processing.
Jason Gorman
The current state of the art in quantum computing is processors that can do amazingly fast computations addressing such tiny amounts of data as to make them practically useless - or should I say "use case-less"?
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